Set the alarm clock for 11:57 am

Leave this tab open — the alarm only rings while the tab stays open.

The alarm goes off in: ::

You can also try the other alarm clocks

Alarm clock for 11:55 am Alarm clock for 11:56 am Alarm clock for 11:58 am Alarm clock for 11:59 am

Going to bed for a 11:57 am alarm

Asleep by 2:42 am — 6 full sleep cycles, about 9 hours
Asleep by 4:12 am — 5 full sleep cycles, about 7 hours
Asleep by 5:42 am — 4 full sleep cycles, about 6 hours

A sleep cycle runs about 90 minutes, and most people take around 15 minutes to drop off. Waking at the end of a cycle feels easier than waking in the middle of one.

11:57 am across the country

Sydney	11:57 am
Brisbane	11:57 am
Adelaide	11:27 am
Perth	9:57 am
Darwin	11:27 am

Times are worked out live in your browser, so daylight saving is already accounted for.

How to use the online alarm clock

Shift workers switching over around midday often need an alarm that isn't tied to their phone being nearby. This one rings at 11:57 am straight from the browser tab, so a laptop left open on the kitchen table can do the job just as well.

Using it is simple: pick a ringtone from the list, press Start, and leave this tab open in your browser. The alarm runs entirely on this page, so closing the browser will stop it from going off. Come back a minute early if you're not sure you trust it yet.

Some people use this alongside a phone alarm rather than instead of it: a louder backup through laptop speakers, or a way to set a reminder without touching a phone at all. It won't survive the tab closing or the device sleeping, so for anything critical overnight, keep a second alarm running as well. On a 24-hour clock 11:57 am is written 11:57, and spoken aloud it's three minutes to twelve in the afternoon. Timetables and rosters may show it as 11:57, and handwritten notes as 11.57 am. Set an alarm for 11:57 am, set the alarm to 11:57 am, set my alarm for 11:57 am — all of it lands on this page and does the same thing.

Common questions

Why use a browser alarm instead of my phone's built-in one?

Mainly for reliability against silent mode, do-not-disturb, or a phone left charging out of earshot. It's a useful backup or a desk-based alternative, though it depends on this tab staying open rather than running in the background of your phone.

Is there a cost to use this?

No, it's free, with no sign-up and no limit on how many times you set it. It just needs the tab left open until the time you've chosen arrives.

Will the alarm still ring if I close the browser tab?

No. The alarm only runs while this tab stays open — closing it, or closing the browser entirely, stops the countdown before it can ring. Keep the tab open in the background if you need it to go off later.

Does the alarm work if my laptop goes to sleep?

Not reliably. If the device sleeps or the screen locks, the browser tab pauses along with it, so the alarm may not fire on time or at all. Adjust your power settings if you're relying on this over a longer stretch.